Former world boxing champion Hector "Macho" Camacho went into cardiac arrest Wednesday morning and is on life support after being shot in the face Tuesday outside of San Juan, Puerto Rico.

"The situation with Macho is very delicate," Centro Medico director Dr. Ernesto Torres told reporters during a 7 a.m. media briefing on Wednesday. "The prognosis is not good."

Camacho's mother, Maria Matias, arrived in Puerto Rico on Wednesday morning and is expected to decide whether Camacho, 50, should be taken off life support based on the results of further tests due Wednesday afternoon. Torres said the encephalographic tests would determine whether Camacho is brain dead.